San Juan Capistrano Climate by Month
San Juan Capistrano, California, United States
Warm summers and mild winters, with little rain, mostly from December to March.
San Juan Capistrano has warm summers and mild winters, with little rain, mostly from December to March. Expect highs of 83°F (28°C) in August and 67°F (20°C) in February, with the coldest nights (December) near 44°F (6°C). It gets only 11 in (285 mm) of rain a year. May to October are almost completely dry.
- Warmest month
- 83°F(28°C)
- Average high, August
- Coldest nights
- 44°F(6°C)
- Average low, December
- Rain per year
- 11 in(285 mm)
- Wettest: February
- Humidity
- 60%
- Sunniest: July
Best and worst months in San Juan Capistrano
Best for weatherMay, June and November are the best time for weather in San Juan Capistrano: highs near 74°F (24°C) and almost no rain.
Least pleasantJanuary and February are the least pleasant; February is the coldest, with highs of only 67°F (20°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
San Juan Capistrano weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 68°F(20°C) | 44°F(7°C) | 2.1 in(54 mm) | 59% | 2.9 |
| FebFebruary | 67°F(20°C) | 45°F(7°C) | 2.5 in(64 mm) | 58% | 3.4 |
| MarMarch | 69°F(21°C) | 47°F(8°C) | 1.7 in(44 mm) | 61% | 4.8 |
| AprApril | 72°F(22°C) | 49°F(10°C) | 0.9 in(23 mm) | 61% | 5.9 |
| MayMayBest | 73°F(23°C) | 54°F(12°C) | 0.2 in(6 mm) | 65% | 6.2 |
| JunJuneBest | 76°F(25°C) | 57°F(14°C) | 0.1 in(2 mm) | 67% | 6.7 |
| JulJuly | 81°F(27°C) | 61°F(16°C) | 0.1 in(2 mm) | 66% | 6.8 |
| AugAugust | 83°F(28°C) | 62°F(16°C) | 0.1 in(2 mm) | 63% | 6.6 |
| SepSeptember | 82°F(28°C) | 60°F(16°C) | 0.2 in(4 mm) | 61% | 5.5 |
| OctOctober | 79°F(26°C) | 55°F(13°C) | 0.4 in(9 mm) | 58% | 4.1 |
| NovNovemberBest | 73°F(23°C) | 48°F(9°C) | 0.9 in(24 mm) | 50% | 3.3 |
| DecDecember | 67°F(20°C) | 44°F(6°C) | 2.0 in(51 mm) | 53% | 2.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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